Device allowing circtjlail-saw spindles to yield



To all whom may concern Y `jg UNITED STAWENT OFFICE.

HIRAM wELLS, oF FLORENCE, MASSACHUSETTS. e

` DEvrCEALLoWING CIRCULAR-SAW SFINDLES To YIELD.

y speincationyof Lettersratent No. 12,705, dated April 1o, 1855.

` Be it `knownthat I,`HIRAM WELLS, of Florence, in the countyof I-Iampshire and State,` of `Massachusetts, 'have invented an Improved Mechanism for Adjusting and Regulating "thegLongitudinal Movement of the `[Spindle of""a""Cir`cular`Saw; and I `do hereby` declare that `,the sameyis fully deffscribed and represented in `the following e specification and the, accompanying drawings,` letters, figures," and referencesthereof.

"",Ofthe said"drawings, `Figure 1, repre- "sentsfa top view of afspindlefofa circular y, saw supported .in` its""boxes andhaving my h `improvementapplied toit. ',2jis a lon-` ffgitudinalx vertical section ofthe same.

l Fig.' `3 is a transverse `zsecti `m taken through the rearmost `:boxfand the guide to belhero inafterdescribed. f Fig. 4,is a top viewlof theguide and the lower half of ,the rear box.

` In sawing timber witha circular. saw, it becomes necessary to have some contrivance [applied to thei spindle of the saw in order to allowla suiiicient degree of longitudinalplay toeach spindle* to allow the saw to accommodate itselffto the `lateral movement `for springingpof a log while `it is being sawed.

\ ,For this purpose as inl Orlando- Childs pat` lfent of December 17th 185,0, ofwhieh I am wfthe proprietor, .springshave beenused and `applied to the jurnallflboxes. Withmy improvementV vno Msuch application of springs becomes necessary; `nor `do I` use any collarsonthe `saw spindle.;` nor friction rollerse to embracethesaw nearrits periphery as is described in the patent Vof George Page-` dated `July 16th, 184:1, the device I` use be ing applied to Vthe shaftor spindle and with- `inone` of the boxes thereof. e

In carrying out my invention, I provide the saw`spindle,eA, Where it rests in its boxes,

` 13,513, with` an` `angular groove, a, such `groove being made toextend transversely entirely around it. fThe two sides of this `"groove maybe said to be formed by two' h *conical frusta, having their lesserv bases placedin contact. "In connection with this groove f `there is` employed what may be termed the spring guide b, it being arranged so as to slide. freely within a `cylindrical "1 chamber, c, leading downward from the lowerhalf of the box` as seen in the drawh ings The lower partof `the guide is made cylindrical so that it., can turnfreely `and horizontally `within said chamber, While it restspon a spring, e, placed therein as seen in Figs. 2, andf... Theupper part of said guide or thatshownat, f, is formed as seen Y January A. I). 1855.

, in the drawings and with two beveled faces h i, which are borneupward respectively toward the two sides of the groove, a, by the action of the spring before mentioned. The spindle is tobe so made and applied to its boxes as to be capable of being moved longitudinally therein. When the saw is afiixed to it` the saw may be supposed to be arranged on itl as denotedby dotted lines at, S,\in` Figs. 1 and 2. In this improveddevice as herein above described, not only is the saw spindle permitted to have all the endwise play that may be necessary, or which maybe produced by lateral pressure `against the saw while it is in the act of sawing a log, but such saw after being so moved is restored to its correct position by the action of one or the other of the inclined edges of the guide against one of the frusto conical sides of the groove of the saw spindle, such action being produced by the upward pressure of the spring on which the guide rests. The said lateral movements of the saw are also limited within certain bounds, by means of shoulders, 7c, k, (formed in the groove of the shaftas seen in Figs. 2, and 3,) .either of which by abutting against one of the sides of the upper part of the guide will arrest further longitudinal movement of the shaft.

` When the guide is arranged within the box, as described and we pour oil into the hole, fn, of the cup ofthe box, such oil will lubricate both `the journal of the shaft and the guide and its groove, the latter operating to retain the oil within the box. Important advantages in lubricatingthe parts are thus gained by the arrangement of the guide and' its groove within the box, as described.

W'hat I claim is- `Arranging within the box or bearing and combining with it and the saw spindlesubstantially as specified, the guide, its spring, and the compound frusto conical grooves provided with shoulders as described, the Whole constituting a device of great simplicity of construction land of much advantage in not only allowing a circular saw, while in operation to move laterally, but to limit such movement of it and subsequently restore it to its normal or original position.

In testimony whereof I have hereunto set my signature this twenty fourth day of HIRAM WELLS. Witnesses:

HARNEY KIRKLAND,

SAMUEL L. HILL. 

